It is still too early to pick a team for the upcoming season. All teams want to win the title every season and defend it after becoming champions. PSG is no different. PSG will definitely want to retain the title next season and see themselves as champions. But the rest of the teams will not only want to see them. Rather, they will also participate in this fight and fight for the title. The list of strong teams for the upcoming season will definitely include Barcelona and Real Madrid, along with Liverpool, Arsenal, Bayern Munich and Manchester City. Although City is not in a good position right now, they will definitely bounce back once the season starts.
Moreover, I see PSG also not really dominating throughout the competition in the Champions League. They have to work hard to get the title. All teams are improving and preparing the team for the competition. We have to see the development of some strong teams that will also compete. Their performance in the league will definitely give us an idea of how they will compete in the Champions League.
indeed at this time we will not know how the Champions League match will start but what is clear as usual Real Madrid must always be one of the favorite teams and it is true of course like Barcelona, Liverpool, Arsenal, Bayern and Manchester City are also always favorites but what is certain is that PSG also certainly wants to defend their UCL title next season. but of course in my opinion it is also possible that PSG will become champions again if you look at PSG's achievements which now seem to have not slackened and also the technique made by Luis Enrique has always been good until now. so of course PSG can certainly be said to be a team that will certainly be respected by the teams that qualify for the Champions League for next season. I am also the same as you see Manchester City will definitely try to rise again even though of course Manchester City has just been defeated by Al Hilal.
but of course if you look at PSG, they really worked hard to win the trophy last season and of course many did not expect that PSG would win the Champions League. yes of course we'll see what happens in the coming season whether it's the same or not as before, but PSG should be able to easily win consistently in the upcoming Champions League matches if you look at their status who just lifted the UCL trophy. in my opinion sometimes in the UCL and domestic leagues there are always differences, but yes most of the time as you said of course the domestic league has more influence in the Champions League.
surely now all clubs are tidying up and preparing for next season. but it seems that currently the one who is relaxed is Barcelona because unlike other teams participating in the Club World Cup and surely Barcelona when competing later their stamina will certainly have the potential to be stronger.